/* gcc json-example.c -o json-example  -ljson */

#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>

#include <json/json.h>

int main(int argc, char **argv)
{
	struct json_tokener *tok;
	struct json_object *my_string, *my_int, *my_object, *my_array;
	struct json_object *new_obj;
	int i;

	my_string = json_object_new_string("\t");
	/*输出 my_string=   */
	printf("my_string=|%s|\n", json_object_get_string(my_string));
	/*转换json格式字符串 输出my_string.to_string()="\t"*/
	printf("my_string.to_string()=%s\n", json_object_to_json_string(my_string)); 
	/*释放资源*/
	json_object_put(my_string);

	my_string = json_object_new_string("\\");
	printf("my_string=%s\n", json_object_get_string(my_string));
	printf("my_string.to_string()=%s\n", json_object_to_json_string(my_string));
	json_object_put(my_string);

	my_string = json_object_new_string("foo");
	printf("my_string=%s\n", json_object_get_string(my_string));
	printf("my_string.to_string()=%s\n", json_object_to_json_string(my_string));

	my_int = json_object_new_int(9);
	printf("my_int=%d\n", json_object_get_int(my_int));
	printf("my_int.to_string()=%s\n", json_object_to_json_string(my_int));

	/*创建个空json对象值数组类型*/
	my_array = json_object_new_array();
	/*添加json值类型到数组中*/
	json_object_array_add(my_array, json_object_new_int(1));
	json_object_array_add(my_array, json_object_new_int(2));
	json_object_array_add(my_array, json_object_new_int(3));
	json_object_array_put_idx(my_array, 4, json_object_new_int(5));
	printf("my_array=\n");
	for(i=0; i < json_object_array_length(my_array); i++) {
		struct json_object *obj = json_object_array_get_idx(my_array, i);
		printf("\t[%d]=%s\n", i, json_object_to_json_string(obj));
	}
	printf("my_array.to_string()=%s\n", json_object_to_json_string(my_array));    

	my_object = json_object_new_object();
	/*添加json名称和值到json对象集合中*/
	json_object_object_add(my_object, "abc", json_object_new_int(12));
	json_object_object_add(my_object, "foo", json_object_new_string("bar"));
	json_object_object_add(my_object, "bool0", json_object_new_boolean(0));
	json_object_object_add(my_object, "bool1", json_object_new_boolean(1));
	json_object_object_add(my_object, "baz", json_object_new_string("bang"));
	/*同样的key 添加会替换掉*/
	json_object_object_add(my_object, "baz", json_object_new_string("fark"));
	json_object_object_del(my_object, "baz");
	json_object_object_add(my_object, "array", my_array);

	printf("my_object=\n");
	/*遍历json对象集合*/
	json_object_object_foreach(my_object, key, val) {
		printf("\t%s: %s\n", key, json_object_to_json_string(val));
	}
	printf("my_object.to_string()=%s\n", json_object_to_json_string(my_object));

	/*对些不规则的串做了些解析测试*/
	new_obj = json_tokener_parse("\"\003\"");
	printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	json_object_put(new_obj);

	new_obj = json_tokener_parse("/* hello */\"foo\"");
	printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	json_object_put(new_obj);

	new_obj = json_tokener_parse("// hello\n\"foo\"");
	printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	json_object_put(new_obj);

	new_obj = json_tokener_parse("\"\\u0041\\u0042\\u0043\"");
	printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	json_object_put(new_obj);

	new_obj = json_tokener_parse("null");
	printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	json_object_put(new_obj);

	new_obj = json_tokener_parse("True");
	printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	json_object_put(new_obj);

	new_obj = json_tokener_parse("12");
	printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	json_object_put(new_obj);


	new_obj = json_tokener_parse("12.3");
	/*得到json double类型
	  printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	  json_object_put(new_obj);

	  new_obj = json_tokener_parse("[\"\\n\"]");
	  printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	  json_object_put(new_obj);

	  new_obj = json_tokener_parse("[\"\\nabc\\n\"]");
	  printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	  json_object_put(new_obj);

	  new_obj = json_tokener_parse("[null]");
	  printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	  json_object_put(new_obj);

	  new_obj = json_tokener_parse("[]");
	  printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	  json_object_put(new_obj);

	  new_obj = json_tokener_parse("[false]");
	  printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	  json_object_put(new_obj);

	  new_obj = json_tokener_parse("[\"abc\",null,\"def\",12]");
	  printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	  json_object_put(new_obj);

	  new_obj = json_tokener_parse("{}");
	  printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	  json_object_put(new_obj);

	  new_obj = json_tokener_parse("{ \"foo\": \"bar\" }");
	  printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	  json_object_put(new_obj);

	  new_obj = json_tokener_parse("{ \"foo\": \"bar\", \"baz\": null, \"bool0\": true }");
	  printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	  json_object_put(new_obj);

	  new_obj = json_tokener_parse("{ \"foo\": [null, \"foo\"] }");
	  printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	  json_object_put(new_obj);

	  new_obj = json_tokener_parse("{ \"abc\": 12, \"foo\": \"bar\", \"bool0\": false, \"bool1\": true, \"arr\": [ 1, 2, 3, null, 5 ] }");
	  printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	  json_object_put(new_obj);

	  new_obj = json_tokener_parse("{ foo }");
	  if(is_error(new_obj)) printf("got error as expected\n");

	  new_obj = json_tokener_parse("foo");
	  if(is_error(new_obj)) printf("got error as expected\n");

	  new_obj = json_tokener_parse("{ \"foo");
	  if(is_error(new_obj)) printf("got error as expected\n");

	/* test incremental parsing */
	//tok = json_tokener_new();
	new_obj = json_tokener_parse("{ \"abc\": 12, \"foo\": \"bar\", \"bool0\": false, \"bool1\": true, \"array\": [ 1, 2, 3, null, 5 ] }");

	printf("-----------\n");
	json_object_object_foreach(new_obj, key2, val2) {
		printf("\t%s: %s\n", key2, json_object_to_json_string(val2));
	}
#if 0
	new_obj = json_tokener_parse_ex(tok, "{ \"foo", 6);
	if(is_error(new_obj)) printf("got error as expected\n");
	new_obj = json_tokener_parse_ex(tok, "\": {\"bar", 8);
	if(is_error(new_obj)) printf("got error as expected\n");
	new_obj = json_tokener_parse_ex(tok, "\":13}}", 6);
	printf("new_obj.to_string()=%s\n", json_object_to_json_string(new_obj));
	json_object_put(new_obj);  
	json_tokener_free(tok);

	json_object_put(my_string);
	json_object_put(my_int);
	json_object_put(my_object);
	json_object_put(my_array); 
	/*如果前面没有添加到对象中， 必须显示释放，
	  如果添加到对象中，已经释放对象，则无需调用， 在这务必小心，否则很容易内存泄漏*/
#endif

	return 0;
}
